The answer should be C. Se lo leo.
A. salido is the correct past participle for the Spanish verb salir.
Past participle is formed by adding the suffixes -ado, or -ido to the root of the verb, depending on the last letter of the verb.
It's called the tropopause.
The answer is
En el verano, me gustaba mucho columpiarme en el parque de mi vecindario.
It means: in the summer, I really enjoyed playing in the swings at the neighborhood’s park
